Interpenetrating Metal−Organic Frameworks Assembled from Polypyridine Ligands and Cyanocuprate Catenations

Two three-dimensional coordination polymers, [(CuCN)3(4-pyBpy)]n (1) and [(CuCN)4(3-pyBpy)]n (2), as rare examples of coordination polymers of nonchelating quaterpyridines, demonstrating 4- and 2-fold interpenetrations, respectively, were isolated from solvothermal reactions of 2,6-bis(4-pyridyl)-4,4′-bipyridine (4-pyBpy) and 2,6-bis(3-pyridyl)-4,4′-biyridine (3-pyBpy) with CuCN in DMF and were structurally characterized.